James Tucker
f7c1b8e526
tailscaled runs under a Type=notify unit, so NOTIFY_SOCKET is in its environment. The desktop probe ran loginctl with that environment inherited. loginctl sends sd_notify(3) messages on exit and error, and lives in the daemon's cgroup, so systemd took each message as coming from the tailscaled unit and rejected it: tailscaled.service: Got notification message from PID 1234, but reception only permitted for main PID 1000 One failing exec sends two messages, ERRNO=... and EXIT_STATUS=... That is the pair of rejected lines seen at each SSH session on Debian-family hosts. The per-connection ssh-monitor child also received the daemon's full environment. Helpers exec'd by tailscaled now get the daemon's environment without the systemd service-instance variables: NOTIFY_SOCKET, WATCHDOG_PID, WATCHDOG_USEC, LISTEN_FDS, LISTEN_PID, LISTEN_FDNAMES, INVOCATION_ID, JOURNAL_STREAM. The scrub covers the loginctl and getenforce probes, the direct-exec fallback probe, and the ssh-monitor spawn. Session children still never receive the daemon's environment. The monitor still gives children running as the connection's user no daemon variables. The daemon's own environment is unchanged. Updates tailscale/corp#50380 Change-Id: Ic686726473e851e2855e75eea11d7b3f75440311 Signed-off-by: James Tucker <james@tailscale.com>
Tailscale
Private WireGuard® networks made easy
Overview
This repository contains the majority of Tailscale's open source code.
Notably, it includes the tailscaled daemon and
the tailscale CLI tool. The tailscaled daemon runs on Linux, Windows,
macOS, and to varying degrees
on FreeBSD and OpenBSD. The Tailscale iOS and Android apps use this repo's
code, but this repo doesn't contain the mobile GUI code.
Other Tailscale repos of note:
- the Android app is at https://github.com/tailscale/tailscale-android
- the Synology package is at https://github.com/tailscale/tailscale-synology
- the QNAP package is at https://github.com/tailscale/tailscale-qpkg
- the Chocolatey packaging is at https://github.com/tailscale/tailscale-chocolatey
For background on which parts of Tailscale are open source and why, see https://tailscale.com/opensource/.
Using
We serve packages for a variety of distros and platforms at https://pkgs.tailscale.com.
Other clients
The macOS, iOS, and Windows clients use the code in this repository but additionally include small GUI wrappers. The GUI wrappers on non-open source platforms are themselves not open source.
Building
We always require the latest Go release, currently Go 1.27. (While we build releases with our Go fork, its use is not required.)
go install tailscale.com/cmd/tailscale{,d}
If you're packaging Tailscale for distribution, use build_dist.sh
instead, to burn commit IDs and version info into the binaries:
./build_dist.sh tailscale.com/cmd/tailscale
./build_dist.sh tailscale.com/cmd/tailscaled
If your distro has conventions that preclude the use of
build_dist.sh, please do the equivalent of what it does in your
distro's way, so that bug reports contain useful version information.
Bugs
Please file any issues about this code or the hosted service on the issue tracker.
Contributing
PRs welcome! But please file bugs. Commit messages should reference bugs.
We require Developer Certificate of
Origin
Signed-off-by lines in commits.
See commit-messages.md (or skim git log) for our commit message style.
About Us
Tailscale is primarily developed by the people at https://github.com/orgs/tailscale/people. For other contributors, see:
- https://github.com/tailscale/tailscale/graphs/contributors
- https://github.com/tailscale/tailscale-android/graphs/contributors
Legal
WireGuard is a registered trademark of Jason A. Donenfeld.